I too would highly recommend getting something more generalized. Equine jobs that are sustainable are hard to come by, and invariably it's long hours, dangerous work, (usually) low pay, and a high chance of getting taken advantage of by unscrupulous people with no legal recourse. Jobs are scarce, especially ones that pay decently.
If you enjoy science and biology, equine science CAN be a good route to take, but you'd want to major in another science and possibly minor in equine science. Equine reproductive science will always be a great scientific field, but you'd have to travel to where the jobs are.
I'd say get a generalized business degree. You can take it so many different places and apply it to so many other types of work (including if you ever start your own horse-related business down the road). It teaches you organization, financial, accounting, and many other skills that an equine degree will only briefly touch on. If you like math, accounting is not the most exciting job on earth, but it pays VERY well if you are decent at it, and people are always looking for accountants.
Play to your strengths, but it might take you some trial and error to find out just where your strengths lie. Don't go solely on "I like horses" or "I don't like math" when you look at choosing careers. Sometimes you'll get into a career you thought you'd love and hate every second. Sometimes you'll get into something you thought you'd hate or feel ambivalent about, and you'll love it. I had just that experience- I went from massage therapy, to being a bank teller, to doing finance analysis for a big company, and now I work as a project manager/technical writer for a great company that I love. You never know where life will take you, career-wise, but it's wise to invest as much as possible into skills you can use elsewhere.